driver_select(0x0000000000000220, 22, ERL_DRV_READ ERL_DRV_USE, 1) by tcp_inet driver #Port<0.20000> failed: fd=22 (re)selected before stop_select was called for driver efile I suppose, that it is somehow related to using sendfile with cowboy_http_static, but not sure yet. Has someone met with the same problem?